The UAC Marine Corps
Humanity's last line of defense before the Slayer arrives.
The Universal Aerospace Corporation Military Forces, commonly known as UAC Marines, serve as the armed wing of humanity's largest interplanetary conglomerate. Originally tasked with securing lunar and Martian colonies like Phobos and Deimos, their mandate shifted drastically following demonic breaches. They represent organized human resistance against Hell, often serving as both victims of the invasion and reluctant allies to the Doom Slayer. Throughout various timelines, these soldiers have been depicted wearing distinct power armor and utilizing advanced weaponry derived from UAC research. Their presence is ubiquitous in the conflict, marking the transition from corporate security to planetary defense against an existential threat.
- Affiliation
- Universal Aerospace Corporation
- Role
- Planetary Security & Combat
- First Appearance
- DOOM (1993)
- Equipment
- Plasma Rifles & Heavy Armor
- Status
- Decimated but Active
- Key Figure
- Commander Kelly
- Base of Operations
- Phobos, Deimos, Earth
Lore & Background
In the early days of interplanetary expansion, these forces were standard security personnel equipped for industrial conflicts and riot control. However, the accidental summoning of demons transformed their role into survival combatants. They utilize advanced plasma weaponry and powered armor to hold back hordes of Hellspawn. Despite their training, they are often outmatched by the supernatural nature of their enemies, leading to high casualty rates across multiple timelines. The UAC prioritizes research over soldier safety in some accounts, leaving Marines stranded when facilities fall under demonic siege. Their evolution into a true military force is marked by the events on Earth and space stations where they coordinate with the Doom Slayer. While often overwhelmed, their tactical knowledge of UAC infrastructure makes them vital for navigation during invasions.
In Their Own Story
The comms crackle with static as Private Halloway checks his ammo count. Zero rounds left in the plasma rifle. Around him, the corridors of Facility 13 burn orange with hellfire. A Cacodemon screams overhead, dropping acid rain on the squad. Fall back! screams Sergeant Vane, but there is nowhere to go. The heavy blast doors seal shut behind them. They stand their ground anyway, hoping their sacrifice buys time for the one man who can end this.
Reader's Guide
The UAC Marine Corps operates under a strict military hierarchy designed for rapid deployment across hostile environments. Their primary goal shifted from corporate security to species survival after the interplanetary portals opened, forcing them into direct combat with supernatural entities. Commanders like Kelly coordinate efforts against Hell's armies while managing limited resources on Earth and space stations. They view the Doom Slayer as a necessary weapon of mass destruction, though often misunderstood by higher command initially due to his extreme lethality. Their relationship is complex; they fight alongside him but also struggle to contain his violence within UAC protocols. Ultimately, many units sacrifice themselves to buy time for humanity or the Slayer to reach critical objectives. Despite heavy losses, their resilience highlights human determination in the face of impossible odds. They serve as the bridge between civilian populations and the front lines of the war against Hell.
Did You Know?
- UAC Marines were originally designed for industrial security before facing demons.
- Commander Kelly appears across multiple modern Doom titles as a key liaison.
- Their plasma technology is derived from Hell energy research gone wrong.
- In lore, many units are lost during the initial breach at Phobos.
More in Factions & Groups
Elsewhere in the Doom universe
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